The Great Imitator

Many diseases are difficult to diagnose, because they don't follow a specific pattern or they imitate the pattern of another disease.

This happens when the signs and symptoms of the disease are non-sensitive and non-specific.
Multi-system diseases usually have very variable presentations.

• Neoplasms
• Diffuse large B-cell lymphoma
• Infectious diseases
• Brucellosis
• Lyme disease
• Malaria
• Nocardiosis
• Syphilis
• Tuberculosis
• Autoimmune diseases
• Coeliac disease
• Fibromyalgia
• Multiple sclerosis
• Psoriatic arthritis
• Systemic lupus erythematosus
• Metabolic and endocrine diseases
• Addison disease
• Amyloidosis
• Hypoglycaemia (great imitator of a stroke)
• Phaeochromocytoma
• Pulmonary embolism
• Sarcoidosis
• Sleep apnoea